CN1513272B - Method for establishing communicaiton channels between network elements - Google Patents
Method for establishing communicaiton channels between network elements Download PDFInfo
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- CN1513272B CN1513272B CN028112482A CN02811248A CN1513272B CN 1513272 B CN1513272 B CN 1513272B CN 028112482 A CN028112482 A CN 028112482A CN 02811248 A CN02811248 A CN 02811248A CN 1513272 B CN1513272 B CN 1513272B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
- H04Q3/0062—Provisions for network management
- H04Q3/0087—Network testing or monitoring arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0016—Arrangements providing connection between exchanges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1307—Call setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13076—Distributing frame, MDF, cross-connect switch
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13098—Mobile subscriber
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13204—Protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13213—Counting, timing circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13292—Time division multiplexing, TDM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13336—Store & forward, messaging systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13389—LAN, internet
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- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Small-Scale Networks (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Cable Accessories (AREA)
- Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
A method of establishing a connection between network elements is disclosed, in which, when a network element is newly connected, it enters a first mode (the seek mode), in which it attempts to establish the required network connections. In the first mode, the network element continuously sends short messages, once in each time slot. The second mode of operation of the network elements (the standby mode), in which they already have established connections, involves listening for such messages being sent from newly connecting network elements. On detection of such a message, therefore, the already connected network element sends a reply message to the newly connected network element, and the two network elements establish a connection between them.
Description
Technical field
The present invention relates to a kind of process of using can be in new network element being connected into the network of communication network for example the time.
Background technology
Radio telecommunication network comprises a lot of parts, and these parts must link together.As an example, a network will typically comprise radio base station (RBS) and base station controller (BSC), and they are connected (DXC) equipment by router and link together with digital crossover.These parts are commonly called network element (NE) at this.
Connection between network element E1/T1 typically connects, and is divided into frame, and each frame comprises a plurality of time slots.The E1/T1 frame is made up of 32 or 24 time slots respectively.If one connects and uses 32/24 all time slots, this is called as (whole) E1/T1 connection entirely.
Yet in many cases, the connection between two network element is certain part that E1/T1 connects.Especially when two network element connect by a digital cross connect equipment this situation can appear, because can be multiplexed into the link to two heterogeneous networks unit to the single link of the 3rd network element like this.
Also need consideration equipment whether to support time slot integrality (integrity).If support that each time slot has same delay by equipment the time.Yet some equipment are not supported the time slot integrality, make different time slots that different delays be arranged.In this case, for many application, must these differences of compensation.An example is exactly whether to use the communication of adopting Internet Protocol (IP) protocol sequence (suite).
When connecting between two network element, for example when adding a new network element, it is favourable distributing the time slot of maximum available.In addition, it is favourable setting up process automatically, so that reduce the requirement that the operator is participated in during setting up process.
WO99/56485 has described a kind of system, the wherein installation of base station controller control and monitoring network unit, and distribute the telecommunications capacity automatically, use for this network element.Distribute required capacity one group of unappropriated continuous slot from communication link, one of these time slots are used as communication channel, for base station controller to network element sending time slots assignment information unit.
Yet this mode is owing to need to use a time slot can reduce to be used in the bandwidth that sends data between the network element as a communication channel.
In addition, can distribute active volume in order to make base station controller, it must have the information that relevant cross-coupled time slot connects.
Summary of the invention
According to the present invention, a kind of method that connects between network element is provided, wherein, when connecting network element recently, this network element enters first pattern (search pattern), and wherein it attempts to set up needed network connection.In first pattern, this network element sends SMS message continuously, and each time slot sends once.This time slot of each message definition and the network element that is sending.
Specifically, according to a kind of method of between first network element and other network element, setting up communication channel of the present invention, when connecting first network element for the first time, this method may further comprise the steps: send signal from first network element in each time slot on each frame in wired connection between first network element and other network element; Detect by other network element in first network element and to reply and the response message that sends; Detect described response message and be connected to other network element to determine which time slot on each frame, described response message is sent out in the time slot that connects; And set up communication channel by described being wired between first network element and other network element, described communication channel comprises a plurality of time slots, receives the message of replying from described other network element in these a plurality of time slots.
According to of the present invention a kind of first network element that is connected to network recently with have the method for setting up communication channel between other network element that the network set up is connected, may further comprise the steps: on each time slot of first network element, intercept the message that receives from other network element; Determine which time slot of first network element can set up communication channel with other network element; And between first network element and other network element, set up wired connection, described wired connection comprises all time slots that can set up described communication channel, described communication channel comprises a plurality of time slots, receives the message of replying from described network element in these a plurality of time slots.
Network element second mode of operation (standby mode) comprises intercepts the message that is sending from the network element that connects recently, wherein in second pattern, these network element connect.Therefore, detecting such message, the network element that has connected just sends response message to this network element that connects recently, and these two unit just connect between it.Network element in second operator scheme preferably also with clocklike, not frequent interval sends message.Therefore, as the part of first pattern of operating, network element is intercepted the message that sends from other network element.
The advantage of this process is that it allows to connect fast and reliably, thereby maximizes the use of available time slot.
In addition, it allows suitable establishment of connection, and does not need the knowledge that the time slot in the Cross Connect equipment connects in the related network.
According to a further aspect in the invention, provide a kind of network element that is adapted to operate in above-mentioned two kinds of patterns.
Description of drawings
Fig. 1 shows a kind of network of the method according to this invention work;
Fig. 2 has described the connection between two network element;
Fig. 3 is the flow chart of a description according to process of the present invention;
Fig. 4 shows according to the connection between two network element of phase I in the process of the present invention;
Fig. 5 shows the connection between two network element of second stage in described process.
Embodiment
Fig. 1 shows and a kind ofly wherein can realize radio circuit of the present invention.Certainly should be realized that Fig. 1 only shows the very little part of a very large network, but for the sake of clarity, only show a spot of equipment.
Like this, in the network of Fig. 1, base station controller (BSC) 10 is connected to three radio base stations (RBS) 12,14,16 by Internet Protocol (IP) router one 8 and three Cross Connect equipment (DXC) 20,22,24.
BSC, RBS and router are commonly called network element (NE) at this.
Fig. 2 has described two network element and how can link together.Particularly, Fig. 2 a shows the physical connection between them, and Fig. 2 b has described the logic connection.Therefore, first network element (NE1) 30 is a radio base station in this case, is connected to one second network element (NE2) (being an ip router) by a digital cross connect equipment 32 in this case.
Shown in Fig. 2 b, the full rate between two network element is connected and comprises 32 time slots in each frame.Yet, also may be that part connects.In such cases, the time slot 2,3,6,11 of first network element 30 is connected to the time slot 3,4,6,8 of second network element 34.Therefore the connection between these two network element only is 1/8 of a full rate.Therefore these two network element may be connected on other equipment.For example, router three 4 can be connected to one or more other radio base stations by Cross Connect equipment 32.
The present invention relates to one of them network element and newly added to the situation of a network, and provide one can set up the essential process that connects whereby automatically.In general, maximum available bandwidth is used in this connection that helps between any two unit.Yet when a network element newly was added, for example when a radio base station is connected for the first time, it not have any information about the available bandwidth that is used to be connected to other network element usually.
This method is applicable to all of the port of a network element (NE).For this NE, will there be two kinds of operator schemes, i.e. search pattern and standby mode.When starting, NE is in search pattern, and attempts to connect by port.If the trial and success that connects, NE will enter standby mode within a certain period of time.
In search pattern, NE sends SMS message continuously, is sending a short message on all of the port on each time slot.These message are called as equipment room connection procedure (Inter-Equipment Connection Procedure) message (IECP message).
Each IECP message comprises:
High-Level Data Link Control (HDLC) frame has:
-NE identifier 2-8 byte
-port numbers 1 byte
-timeslot number 1-2 byte
-HDLC frame: sign+CRC 3 bytes
Therefore, this message will comprise that for example NE identifier, a definition message of sequence number are the port numbers of which the port transmission from NE and define the timeslot number which time slot is used for this message.These message are configured frame in the HDLC framing procedure.Timeslot number can be the number of operation or the combination of the timeslot number in port numbers and the port continuously on all time slots on all of the port.
In search pattern, will there be a unique message that sends on each available time slot.If NE for example has two E1, will walk abreast so sends 2 * 31 message (each E1 has 32 time slots, but time slot 0 can not use).During being in search pattern whole, repeats NE the message that sends on these time slots.
Because for each different time-gap, in every frame, repeat identical message, therefore when sending first message only to the verification of HDLC message with calculate once.
When NE sent IECP message, it intercepted the information that receives on port.
Fig. 3 shows and intercept when being connected to first network element on the network recently and being in search pattern the process of carrying out of intercepting in first network element (NE1).
In step 50, network element begins to intercept any HDLC message that receives on each time slot on all parallel time slots.In step 52, network element periodically determines whether to have detected any IECP message.
If detect one or more IECP response messages, just mean that NE1 is connected to the one or more time slots on the NE (for example NE2), perhaps it is connected to a plurality of NE of sending IECP message (for example NE2, NE3 etc.).By checking the IECP response message that receives, NE1 can determine which time slot is connected to NE2.These time slots will be set up a channel from NE2 to NE1.Being noted that not necessarily needs these time slots on a port.
When time slot was connected by a Cross Connect equipment, all time slots had identical standard at both direction.For example, if NE1 receives IECP message on port A, time slot 3,4,7 and 8, and these message all send (as shown in Figure 4) from NE2 port A on time slot 10,11 and from port B, time slot 5,6, and then NE2 is receiving the IECP message (as shown in Figure 5) that is sent on NE1 port A, the time slot 3,4,7 and 8 respectively on port A time slot 10 and 11 and on the port B, time slot 5,6.
When in step 52, detecting a channel, this process forwards step 54 to, wherein NE1 and NE2 carry out the handshaking of the validity of channel, and they have detected the time slot of similar number and they all use identical time slot (an independent time slot can be used to this communication) on both direction NE2 check.After this, NE1 and NE2 will selectively check the time slot integrality as discussed in more detail below.Then, two network element NE1 will begin for example to set up a peer-peer protocol (PPP) according to the PPP standard with NE2 and be connected.
Now, between two network element, set up the communication channel that comprises all available time slot.This has minimized the delay of the packet that will transmit between network element.
If the first network element NE1 also detects IECP message from another network element except detecting IECP message from the second network element NE2, it will carry out same negotiations process with this network element.Yet if do not find other connection during the time interval in a for example second, this network element just enters stand-by state.
Yet if all do not detect any IECP message in step 52 always, this process forwards step 56 to, in this step the test first period (time period) for example 100 milliseconds whether expire.
If this first period is not expiration also, then when this process turned back to step 50, this network element continued to intercept all time slots.
On the other hand, if first period expired, this process just forwards step 58 to, and wherein this network element is intercepted the HDLC message of using E1/T1 to receive as 31/24 an independent time slot wide channels.In step 60, network element periodically determines whether to have detected any HDLC message.
If the first network element NE1 detects a HDLC message, this may mean that the network element NE2 that sends that message is such network element: it is not equipped to uses equipment room connection procedure IECP described here, but one is attempted to begin the standard router that PPP connects.As a result, process forwards step 54 to, and NE1 will begin to set up a PPP according to the PPP standard and connect.
If do not detect HDLC message in step 60, this process forwards step 62 to, determines at this that this network element is intercepted on complete channel and whether has surpassed one second period, for example 300 milliseconds.If no, program turns back to step 58, and this network element continues to intercept whole channels.
On the other hand, expire if determined for second period in step 62, then process turns back to step 50, and this network element restarts to intercept the message that receives on each time slot on all parallel time slots.
Therefore, as mentioned above, in case a network element connects with at least one other network element, it will enter stand-by state, will scan untapped time slot in this state.In order to reduce the influence to the network element computing capability as far as possible, this scanning should take place on low frequency ground.
If the scan period in stand-by state is found an IECP message, then, will search for all untapped time slots immediately to find any more IECP message and the suitable response message that is sent in order to connect with new NE at once.
In a preferred embodiment of the invention, be in a network element continuous IECP of transmission message under standby mode of standby mode.The advantage that is had is exactly that the network element that connects recently will just receive an IECP message soon after connecting.
Yet an interchangeable embodiment is possible, and the network element that wherein is in standby mode sends IECP message discontinuously and just sends IECP message with the interval of relatively low frequency.Possible use-case of the present invention is to have had to the connection of a network two network element, but a direct stube cable between them but be the first time be established in.In this case, when cable is connected, these two network element all will be in standby mode.Can set up therebetween connection in order to ensure these two network element, need to select corresponding duration and the frequency of corresponding following time period, in this time period, the network element that is in stand-by state scans the time slot of the IECP message that is used to receive, with corresponding duration and the frequency of selecting the corresponding following time period, in this time period, the network element that is in stand-by state sends IECP message.In some cases, a network element that is in standby mode might periodically scan the time slot of the IECP message that is used to receive, and just will send IECP message but only respond the message that receives from another network element.
Describe a system above, wherein when it is connected, set up a configuration when a network element that connects recently.Yet, in a preferred embodiment of the invention, advantageously can pre-configured this NE.For example, network element may be by pre-configured, thus make it will be always in the assigned timeslot communication of a particular port.If know this network configuration in advance, just can use like this.
The supposition of previously described system is whenever a network element is connected on this network, and this network element just uses IECP to set up a configuration.Yet in one embodiment of the invention, NE may be such, when being utilized IECP, it disposes automatically, and during subsequently by the temporarily disconnected power supply, can the directly old configuration of use when starting.As selection, even under these circumstances, this NE can be configured to like this, thereby makes it will experience the IECP process once more, to guarantee not change network configuration during dump.
Because, if the connection on link temporarily disconnects, it may be very important connecting as quickly as possible, so a preferred embodiment of the present invention is the existing configuration that remember before interrupting, and should use with interrupt before same configuration rebuild and be connected.Having only when rebuilding does not have just should use the IECP process to determine a new configuration when successful.
As previously mentioned, when transmitting an E1/T1 connection, many digital cross connect equipments provide the time slot integrality, and its implication is equally to postpone all time slots.Not all equipment all provides the time slot integrality, but it is very important having the time slot integrality in IP uses, therefore in a preferred embodiment of the invention, equipment room connection procedure IECP provides a kind of and is used to detect various delays can compensate the method for these delays.
As an example, one first network element NE1 can send same HDLC message (message 10) and give one second network element NE2, and this message sends on each time slot of channel between NE1 and the NE2, and originates in the identical time frame on all time slots.On all time slots, send one second message (message 2) then immediately, or the like.Each message all comprises a sequence counter that comprises message number.
At receiver side, just in NE2, it only compares for example time of reception of all second message of corresponding message.If the message on the time slot 1 arrived a frame before the message on the time slot 2, this just means that time slot 2 has been delayed a frame between NE1 and NE2.
The inverse that can introduce measured delay in receiver comes compensating delay.
This method can combine with the IECP search pattern.
Detect a kind of selection of the method for various delays as the front, on all time slots, send the binary number of a byte.In first frame, all send one, in second frame, all send two, or the like.It will be very simple detecting different delays again the recipient.
According to the present invention, network element can also be determined the mode of operation expected, with as the part of connection procedure automatically.For example, if that NE is operation is IP-based, BSC based on the radio base station of the communication (Abis) of standard STM, depends on network to the communication of RBC or operation, then just can come the selection of deterministic model by network.All right configuration network unit is with specific LapD message of search on a time slot.This message will indicate this connection will be used as an Abis connection.The LapD message of wanting is a CF message.If find a CF message, NE will stop further search, leave the IECP pattern and enter a standard A bis program.Like this, if equipment uses the LapD signaling, this just can be designated when connecting.
Described the present invention though up to the present connected with reference to the E1/T1 between the network element, the present invention also can be for example connects by PDH or SDH and is applied to 8Mbit/s, 34Mbit/s or the transmission system of high-order more.
Therefore, if there is the equipment of supporting IECP on the communication link opposite side, method then of the present invention will in most of the cases be supported automatic configuration.No matter communication link is only to use some time slots, or this communication link is a complete E1/T1 (or more high-order) communication link, above-mentionedly all be suitable for, and above-mentioned permission is selected between IP BSS pattern and standard BSS pattern automatically.
In addition, if the network element that can operate IECP is being connected under the situation of not using IECP on the NE, then all using under the situation of IP agreement two network element, this network element can be set up one and meet being connected of current I ETF and ITU-T standard, but needs an artificial process under the situation of not using all time slots.
Should be noted that in most modern network unit this method is a software solution and does not require that any hardware is adaptive.
In addition, this method allows the quick foundation of connection.If two network element that just connecting are arranged, this can finish with interior at one second.If this NE cost reaches all time slots of 100ms time sweep, and spends up to the whole E1/T1 of 300ms time sweep, then NE will detect other NE within 200-400ms.There is time enough to can be used for shaking hands and entering stand-by state then.
In many cases, when a NE is installed, can after finishing the IECP method, begin immediately with communicating by letter of other NE, though existence that intermediate interdigitated connects and configuration be unknown also be like this.This makes inspection communication work when installing becomes possibility, even also be like this under the situation that does not touch Network Management equipment.
In addition, the use of this method has reduced the requirement to personnel's awareness network topology that network element is installed, and, if this network is reconfigured and network element between bandwidth be changed, in most of the cases page or leaf does not need to visit the NE website.
Therefore, being installed in several modes of a network element all will be easier and more rapidly.
Claims (12)
1. a method of setting up communication channel between first network element (NE1) and other network element (NE2) is characterized in that, when connecting first network element (NE1) for the first time, this method may further comprise the steps:
In each time slot on each frame in wired connection between first network element (NE1) and other network element (NE2), send signal from first network element (NE1);
Detect by other network element (NE2) in first network element (NE1) and to reply and the response message that sends;
Detect described response message and be connected to other network element (NE2) to determine which time slot on each frame, described response message is sent out in the time slot that connects; With
Set up communication channel by described being wired between first network element (NE1) and other network element (NE2), described communication channel comprises a plurality of time slots, receives the message of replying from described other network element (NE2) in these a plurality of time slots.
2. the method for claim 1, the step of wherein setting up communication channel are included in carries out handshaking and uses point-to-point protocol to set up communication channel between first network element (NE1) and other network element (NE2).
3. the method for claim 1, the step that wherein sends signal comprises:
In each time slot, send the signal of identification first network element (NE1) and identification corresponding time slot.
4. method as claimed in claim 3, wherein said signal is also discerned the port of first network element (NE1).
5. as claim 3 or 4 described methods, wherein said signal also comprises check value.
6. method as claimed in claim 5, wherein detect-message comprises with the step of setting up communication channel:
On each time slot, intercept the message that from other network element (NE2), sends; With
Also comprise, if in first period, do not receive message:
On whole wired connection link, intercept any message that receives; With
In order to respond any message that receives like this, on whole wired connection link, set up communication channel.
7. method as claimed in claim 6 also comprises: after setting up communication channel, enter standby mode, comprise and intercept any message that sends from other network element.
8. method as claimed in claim 7 also comprises: in standby mode, in order to respond any detected message that sends from other network element, send response message.
9. method as claimed in claim 8 also comprises: in standby mode, send message at interval with preset time.
10. method as claimed in claim 9 also comprises:
From first network element (NE1), send signal on the identical time location in each time slot; With
The signal that detection receives is with the time slot integrality on the test communications channel.
11. method as claimed in claim 10 also comprises:
Store the details of any communication channel of having set up; With
Under the situation of power interruptions, use the details of storage to rebuild communication channel.
12. method as claimed in claim 11 also comprises and determines desired operator scheme on this communication channel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0113530A GB2376378A (en) | 2001-06-04 | 2001-06-04 | Establishing a connection between a network and a new network element |
| GB0113530.0 | 2001-06-04 | ||
| PCT/EP2002/005923 WO2002100122A1 (en) | 2001-06-04 | 2002-05-29 | Allocating resources to newly connected network elements |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1513272A CN1513272A (en) | 2004-07-14 |
| CN1513272B true CN1513272B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN028112482A Expired - Fee Related CN1513272B (en) | 2001-06-04 | 2002-05-29 | Method for establishing communicaiton channels between network elements |
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|---|---|
| US (1) | US7620007B2 (en) |
| EP (1) | EP1396163B1 (en) |
| CN (1) | CN1513272B (en) |
| AT (1) | ATE352959T1 (en) |
| DE (1) | DE60217862D1 (en) |
| GB (1) | GB2376378A (en) |
| WO (1) | WO2002100122A1 (en) |
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| US8199761B2 (en) * | 2006-04-20 | 2012-06-12 | Nokia Corporation | Communications multiplexing with packet-communication networks |
| CN101874420B (en) * | 2007-11-27 | 2014-07-23 | 皇家飞利浦电子股份有限公司 | Network entry and device discovery for cognitive radio networks |
| US10382273B2 (en) * | 2016-01-20 | 2019-08-13 | Level 3 Communications, Llc | System and method for commissioning a network element |
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| FI106601B (en) | 1997-04-23 | 2001-02-28 | Nokia Networks Oy | Data transmission in cellular networks |
| SE523594C2 (en) | 1997-11-14 | 2004-05-04 | Ericsson Telefon Ab L M | Data switching device and method for information transmission in a cellular mobile system |
| FI106767B (en) * | 1998-04-29 | 2001-03-30 | Nokia Networks Oy | A method for establishing a connection between network elements in a radio system and a radio system |
| FI106766B (en) * | 1998-04-29 | 2001-03-30 | Nokia Networks Oy | Procedure for connecting network elements to radio systems and radio systems |
| US6744762B1 (en) * | 1998-09-01 | 2004-06-01 | Canon Kabushiki Kaisha | Node device, communication network having a plurality of node devices, and control method therefor |
| FI982321A0 (en) | 1998-10-26 | 1998-10-26 | Nokia Telecommunications Oy | Transmission network |
| US6725038B1 (en) | 1999-01-26 | 2004-04-20 | Nokia Corporation | Method and apparatus for speeding up AAL2 connection setup during handover in advanced cellular networks |
-
2001
- 2001-06-04 GB GB0113530A patent/GB2376378A/en not_active Withdrawn
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2002
- 2002-05-29 CN CN028112482A patent/CN1513272B/en not_active Expired - Fee Related
- 2002-05-29 AT AT02740666T patent/ATE352959T1/en not_active IP Right Cessation
- 2002-05-29 US US10/479,292 patent/US7620007B2/en not_active Expired - Fee Related
- 2002-05-29 EP EP02740666A patent/EP1396163B1/en not_active Expired - Lifetime
- 2002-05-29 WO PCT/EP2002/005923 patent/WO2002100122A1/en active IP Right Grant
- 2002-05-29 DE DE60217862T patent/DE60217862D1/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0886447B1 (en) * | 1997-06-18 | 2005-03-16 | T-Mobile Deutschland GmbH | Method and device for routing signals in digital telecommunication systems |
Non-Patent Citations (1)
| Title |
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| 全文. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE60217862D1 (en) | 2007-03-15 |
| ATE352959T1 (en) | 2007-02-15 |
| US7620007B2 (en) | 2009-11-17 |
| US20040190521A1 (en) | 2004-09-30 |
| GB0113530D0 (en) | 2001-07-25 |
| EP1396163B1 (en) | 2007-01-24 |
| WO2002100122A1 (en) | 2002-12-12 |
| EP1396163A1 (en) | 2004-03-10 |
| GB2376378A (en) | 2002-12-11 |
| CN1513272A (en) | 2004-07-14 |
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